// MORTGAGE BORROWING CALCULATOR
// HOW MUCH WILL I PAY EACH MONTH?

function costShowResults() {
	var loan = $('#costCalculator #loan').val();
	loan = loan.replace(/\,/g,'');
	var years = $('#costCalculator #years').val();
	var rate = $('#costCalculator #rate').val();
	var monthlyPayment;

	if (loan == '') {
		$('#costCalculator #loan').css('border', '1px solid #cc0000'); 
		alert('Please enter loan amount')
		}
	else if (years == '') {
		$('#costCalculator #years').css('border', '1px solid #cc0000'); 
		alert('Please enter repayment period')
		}
	else if (rate == '') {
		$('#costCalculator #rate').css('border', '1px solid #cc0000'); 
		alert('Please enter interest rate')
		}
	else {
		$('#costCalculator #loan').css('border', '1px solid #999'); 
		$('#costCalculator #years').css('border', '1px solid #999'); 
		$('#costCalculator #rate').css('border', '1px solid #999'); 
		  monthlyPayment = (rate/100/12)/(1 - Math.pow((1 + rate/100/12),(-years*12)) )*loan;
		  if (!isNaN(monthlyPayment))
		  {
			$('.costResultsPopup #costCalcResults').html('£' + addCommas(Math.round(monthlyPayment)));
			Cufon.replace('h1');
			$('.costResultsPopup').show('slow');
			$('.costResultsContainer').show();
		  }
		  else alert('Please enter numeric values and try again');
		}
//		  $('html').css("overflow-y","hidden");
}
function costCloseResults() {
	$('.costResultsPopup').hide();
	$('.costResultsContainer').hide();
//		  $('html').css("overflow-y","scroll");
}
function costClearFields() {
	$('#costCalculator #loan').val('');
	$('#costCalculator #years').val('');
	$('#costCalculator #rate').val('');
}

function costValidateNumber()
{
	loan = $('#costCalculator #loan').val();
	loan = loan.replace(/\,/g,'');
	loanWithCommas = addCommas(loan);
	$('#costCalculator #loan').val(loanWithCommas);
}